Does Section 403 of the First Step Act apply to post-Act resentencing hearings?

Questions Presented 1. Does Section 403 of the First Step Act, Pub. L. No. 115-391, 132 Stat. 5194 apply to a defendant at a post-Act resentencing hearing following vacatur of an unlawful sentence that was imposed pre-Act? 2. Did the Fifth Circuit wrongfully fail to consider the FSA as intervening law to petitioner while also failing to consider that he had a multi-count sentence that was bundled in a sentencing package that was sent back to the district court on remand? 2